Applying this patch removes the SPDY module from the NGINX codebase and replaces it with the HTTP/2 module. After applying this patch, you can no longer configure NGINX to use SPDY.

而在這之後也不會讓 HTTP/2 與 SPDY 同時並存：

This will also be the case for the production-ready release of the HTTP/2 implementation in both NGINX and NGINX Plus. SPDY is being deprecated by Google in early 2016, so there is no need to support both.